|THPMP049||Sequential Excitation Scheme for Laser Stripping of Hydrogen Ion Beams||3558|
Funding: ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE.
Resonant laser excitation of the electron in a hydrogen atom is essential to achieve high-efficiency laser stripping of hydrogen ion (H−) beam. In the laser stripping experiments recently carried out at SNS, an ultra-violet (UV) laser was used to excite the electrons in 1-GeV hydrogen atoms from the n=1 state to the n=3 state. In this talk, we propose a sequential resonant excitation scheme by using two laser beams to excite electrons in a sequence of two steps: from the n=1 state to the n=2 state and from the n=2 state to any higher state. The advantages of the sequential resonant excitation scheme include (1) lower laser power requirement due to higher transition probability in the first excitation step and (2) possibility of shifting the stripping laser wavelength from UV regime to longer wavelengths. An application of the sequential resonant excitation scheme in combination with the double-resonance optical cavity technology to the laser stripping of 1.3-GeV H− beam (envisioned in the SNS proton power upgrade project) will be described.
|DOI •||reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPMP049|
|About •||paper received ※ 14 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019|
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